The invention provides methods for making porous devices from substantially monodisperse populations of substantially spherical particles of polyarylketone polymers or of thio-analogues of such polymers, of selected sizes. The porous devices allow greater control of porosity than previously available porous devices. In some embodiments, the porous devices are frits, filters, membranes or monoliths.

The invention provides separation media of substantially monodisperse populations of substantially spherical particles of polyarylketone polymers or of thio-analogues of such polymers, of selected sizes, and further provides containers, such as chromatographic columns and cartridges, containing substantially monodisperse populations of such particles.

The invention provides methods for making substantially monodisperse populations of substantially spherical particles of polyarylketone polymers or of thio-analogues of such polymers, of selected sizes. Populations of such particles can be used, for example, to form porous devices with greater control of porosity than previously available. In some embodiments, the porous devices are frits, filters, membranes or monoliths.

The invention relates to an insulated conductor comprising an elongate conductor provided with an insulating layer which comprises a polymeric material. Said polymeric material has a crystallinity of at least 25% and includes a repeat unit of general formula

##STR00001##

wherein t1 and w1 independently represent 0 or 1 and v1 represents 0, 1 or 2. The insulating layer has a thickness in the range 2 μm-300 μm.

The present specification relates to a compound comprising an aromatic ring, a polymer comprising the same, a polyelectrolyte membrane comprising the same, a membrane-electrode assembly comprising the polyelectrolyte membrane, a fuel cell comprising the membrane-electrode assembly, and a redox flow battery comprising the polyelectrolyte membrane.

A bioactive composite includes 10% to 40% by weight of calcium sulfate (CaSO.sub.4), 10% to 20% by weight of tantalum pentoxide (Ta.sub.2O.sub.5), and 40% to 80% of polyetheretherketone (PEEK). Calcium sulfate is anhydrous calcium made by removing crystallization water of beta calcium sulfate hemihydrate.

The present invention relates to poly(aryl ether) polymers which can for example be used in lithographic processes for the photofabrication of three-dimensional (3D) articles. The invention further relates to compositions including these poly(aryl ether) polymers. Still further, the invention relates to lithographic methods to form 3D articles or objects that incorporate the aforementioned polymer compositions.

The present invention relates to poly(aryl ether) polymers which can for example be used in lithographic processes for the photofabrication of three-dimensional (3D) articles. The invention further relates to compositions including these poly(aryl ether) polymers. Still further, the invention relates to lithographic methods to form 3D articles or objects that incorporate the aforementioned polymer compositions.

A polyether ketone ketone (PEKK) has a terephthaloyl:isophthaloyl (T:I) ratio of 100:0. A process for preparing the PEKK is also provided. The process includes polymerizing 1,4-bis (4-phenoxybenzoyl) benzene (EKKE) with terephthaloyl chloride (TPC), and an end capping agent in a fluid medium, to obtain a product mixture including the PEKK. The PEKK is thermally stable and is melt processable on compounding, for injection molding and extrusion.

A polyether ketone ketone (PEKK) has a terephthaloyl:isophthaloyl (T:I) ratio of 100:0. A process for preparing the PEKK is also provided. The process includes polymerizing 1,4-bis (4-phenoxybenzoyl) benzene (EKKE) with terephthaloyl chloride (TPC), and an end capping agent in a fluid medium, to obtain a product mixture including the PEKK. The PEKK is thermally stable and is melt processable on compounding, for injection molding and extrusion.